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Abstract #3797

Variable Spatial Resolution Dual-Venc 4D Flow MRI: Balancing Image Quality and Scan Time

Maria Aristova1, Jianing Pang2, Liliana Ma1, Michael Markl1, and Susanne Schnell1
1Radiology, Northwestern University, Chicago, IL, United States, 2Siemens Healthcare, Chicago, IL, United States

Dual-venc 4D flow MRI has previously been reported to achieve wide velocity dynamic range while maintaining a high velocity-to-noise ratio, which is particularly relevant for neurovascular applications. To increase flexibility in spatiotemporal resolution, we present a prototype implementation of a interleaved 8-point dual-venc 4D Flow acquisition with independently prescribed (prospectively undersampled) spatial resolution of the high venc acquisition, i.e. Variable Spatial Resolution Dual Venc (VSRDV). This allowed anti-aliasing error rates less than 15% error for a high venc spatial resolution of 70-80%. This represents 10-15% reduction of scan time.

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